So far in 2014, 17 children have died after being left in a hot car.
A North Carolina man filmed himself sweating and struggling to breath in his car on a hot day in Raleigh, North Carolina to find out what it is like and to raise awareness.
Terry Bartley's video of his experience in the hot car now has over 1.6 million views on YouTube.
He said he hopes his video will prevent parents from leaving their children in the car.
You can watch Bartley's full video on YouTube.